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公开(公告)号：US20210140233A1
公开(公告)日：2021-05-13
申请号：US17259068
申请日：2019-07-10
Applicant: SOMFY ACTIVITES SA
Inventor： Alexandre CHAT
Abstract: Disclosed is a drive system for driving a screen, that includes an actuator designed to drive in rotation a winding shaft associated with the screen, and a compensation spring. The compensation spring includes a first series of tums having a first spacing; and at least one second series of turns having a second spacing, with a value that is greater than the value of the first spacing.
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